Automatic safety-burner.



' 10.852.370 PATBNTBD APR. so, 19o?.

N. WISE. AUTOMATIC SAFETY BURNER.

APPLICATION FILED JUNE 29, 1906.

2 SHEETS-SHEET 1.

IVI/ENTOR Mii/Zan 74/68- www@ ATTORNEYS PATENTED APR. so, 19o?.

2 MEETS-SHEET 2.

By V60 ATTORNEYS N. WISE. AUTOMATIC SAFETY BURNER.

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NATHAN WISE, OF NEWY YORK, N. Y.

AUTOMATIC SAFETY-BURNER.

Specification of Letters Patent.

Patented April 30, 1907.

Application iled June 29, 1906. Serial No. 324,036.

To /r//Z inherit t may con/carve:

Be it known that l, NATHAN Wise, a citi- Zen of the United States, and a resident of the city oll New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Automatic Safety-Burner, of which the 'following is a full, clear, and exact description.

rlhis invention relates to burners, and es pecially to gas burners.

Fllie object of the invention is to produce a burner ot this class which is adapted to be used lior illuminatingl or heating purposes, and which is constructed in such a way that, if the llame becomes extinguished by accident without the gas having been turned oil", the burner will automatically shut oil' the flow of gas.

I he general purpose ol' the invention is to prevent the loss et' gas and such accidents as occur from asphyxiation when the gas llame is blown out.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings 'forming a part of this speciiication, in which similar characters ol reference indicate corresponding parts in all the vtigures.

Figure 1 is a vertical central section through a burner constructed according to my invention; Fig. 2 is a perspective showing a portion of the case oi the burner broken away so as to disclose the innei' construction; the upper portion of this view is also broken away 5 Fig. 3 is a vertical section through the upper portion ot the burner and showing the relation of certain parts when the gas is turned oil', Fig. 4 is a cross section on the line 4-4 of Fig. 1 g Fig. 5 is a view similar to Fig. 1 but showing another Vliorin the invention may take; Fig. 6 is a view similar to i, Fig. 2 but representing the torni ot the invenl tion shown in Fig. 5 Fig. 7 is a vertical section through the upper portion ot the tip and representing certain parts in the relation which they have when the gas is turned oil' and Fig. 8 is a cross section on the line 8-8 ot Fig. 5.

Referring more particularly to the parts, and especially to Figs. 1 to 4, 1 represents a cylindrical case, the lower head whereof is integral with the body of the case and formed with an opening 2 as shown.

the case there is received the body 3 of the burner` which is formed below with a neck 4 which projects through the aforesaid opening 2, the said neck being formed with a threaded 6o socket 5 which is adapted to be screwed upon a gas fixture, as will be readily understood. The upper end of the burner body 3 is lornied with an upwardly projecting threaded nipple 6 to which a tube 7 is attached by screw- 6 5 ing the same thereupon. In the upper extremity oi this tube 7 there is seated a gas tip S oit any common type.

The upper' end o'l" the case 1 is closed by a removable cap or bonnet 9 which is lorincd 7o at its center into a guide neck or hub 10, and in this neck there is received a sleeve 11 which surrounds the tube 7 as indicated, and is adapted to slide vertically thereupon.

Rigid with this sleeve 11 there is provided a 7 5 stein 12 which projects downwardly into the interior of the case 1, passing through a guide lug 1S which projects laterally from the face of the burner body 3 as shown. The lowei' end el" this stein is guided in the lowei por- 8o this rack is formed with teeth 17 which mesh 9o with a pinion 1S which is mounted upon the end oi' a plug 19. This plug 19 is of the usual tapered torni and is 'formed with a port 20 which is adapted to admit gas l'roin the lixture to the tube 7, the said gas passingI through a passage 21 termed in the burner body as indicated and leading iiom the socket 5. The upper end of the burner 7 is formed with a reduced neck 22, so that an annular shoulder 23 is `formed around the roo outer side thereof as indicated. The upper end of the sleeve 11 is 'formed with a counterbore 24 in which there is attached a check device in the forni ol an open or split ring 'lhe construction of this rin i is verv clearl T ro shown in Fig. 4; it is Aformed ot an outer strip 26 and an inner strip 27 which are laid over each other as shown, the butt end el the ring being rigidly attached to the end of the sleeve l1 in the counterbore 24 as indicated rio at 2S. The inner strip 27 is composed el' a Vithin 1 metal not having a high coe'llicient of expan- This spring operates normally to 8 5 sion, while the outer strip is formed of a metal having a high coefficient of expansion. I may use brass for the outer strip and iron or similar metal for the inner strip. At ordinary temperatures the form of the check device 25 is such that it maintains itself Within the counterbore 24 so that it does not offer any obstruction to the upward and downward movement of the sleeve. The normal relation of the parts at the upper extremity of the burner is shown in Fig. 3, where it will be seen that the sleeve 11 occupies a depressed position with its upper extremity substantially in alinement with the shoulder 23 aforesaid. I/Vhen the parts are-in this relation the plug 19 is closed. Vhen the gas is turned on the plug 19 will be rotated in the usual manner, admitting gas through the tube 7. As the plug 19 is rotated, the pinion 18 operates to slide the rack 16 upwardly on the stem 12. In this way the sleeve 11 moves up on the tube 7 into the position .in which it is shown in Fig. 1. At the same time the spring 15 will be compressed. A lighted match will be applied to the tip 3 so that the gas becomes lighted. The heat of the Haine immediately raises the temperature of the upper portion of the burner, so that the check device or ring 25 becomes affected. The check device is so sensitive to change in the temperature that it immediately changes its form on account of its being composed of metals having different coefficients of expansion. The brass will, of course, expand to a greater extent than the iron, so that the ring will become more contracted in diameter. This contraction of the ring brings it out of the counterbore 24 into the space above the shoulder 23, so that its lower edge engages the shoulder and locks or checks the sleeve 11 against a downward or return movement. In this way the sleeve becomes secured in the position shown in Fig. 1, and will remain in this condition as long as the temperature in the vicinity of the ring remains sufliciently high. After the gas has been lighted in the manner suggested, the plug 19 may be rotated into any position desired so as to lower the iiame if desired. Such a rotation of the plug is only accompanied by a downward movement of the rack 16 which slides freely on the stem and does not affect the condition of the sleeve. In this connection it must be remembered that there is no positiveconnection between the spring 15 and the rack 16. The rack simply operates to shove the stem upwardly by means of the pin. With the gas turned on and the flame lighted, the parts being in the relation shown in Fig. 1, should the ame become extinguished, the temperature in the vicinity of the tip 8 will become reduced and eventually the check device 25 will disengage itself from the shoulder 23. I/Vhen this occurs, the spring 15 will operate instantly to force ithe sleeve down and thepin 14 will return to its normal depressed position. In advancing the pin 14 in this manner, the rack 16 will be forced downwardly and the plug 19 will be rotated to its off position. On account of this mode of operation, the burner constitutes a safety burner, and evidently the gas will be turned off within a few moments if the flame were blown out or extinguished in any other manner than by turning the plug 19. i

`While I have described the check device as a ring, it should be understood that this form is not essential, and the check device must be considered simply as a member highly sensitive t0 heat, and arranged in such a way that when affected by a rise of temperature, it will lock itself in a certain position.

Instead of maintaining the sleeve 11 in a depressed position normally, I may adopt an arrangement in which the sleeve is normally elevated when the gas isvturned o, the construction being such that when the gas is turned on, the sleeve moves to a depressed position. This form of the invention is clearly illustrated in Figs. 5 to 8 inclusive. Referring to these views, I provide a case 29 which is similar to the case 1 aforesaid, and provided on its interior with a burner body 30 which is similar to the burner body 3 aforesaid. By means of the plug 31, gas may be admitted to a tube 32. The upper extremity of this tube is formed with a reduced neck 33 around which there is attached a check device having the form of an expansion ring 34. This ring is an open ring like the ring 25 described, above, and is formed of two strips of material, an outer strip 35 and an inner strip 36, which are attached together as indicated. A sleeve 37 is provided which surrounds the tube 32 as shown,and, normally, the upper extremity of this sleeve is in alinement with the upper end of the tube as shown in Fig. 7, the expansion ring 34 lying in the annular space between the reduced neck 33 and the inner face of the sleeve, as indicated. The inn er end of the plug 31 is provided with a pinion 38 which meshes with a rack 39 slidably mounted upon a stem 40, which stem is rigid with the sleeve 37 and guided longitudinally in the burner body 30, as shown. At a point below the rack 39 the stem 40 is provided with a cross pin 41 and a coiled spring 42 is provided, disposed around the stem as indicated and thrusting against the under side of this cross pin, the lower side of the spring thrusting against a shoulder 43 formed by recessing the face of the burner body 30-as indicated. I/Vhen the plug 31 is rotated, evidently the pinion 38 will operate upon the rack 39 so as to draw the sleeve 37 downwardly into the position shown in Fig.

' 5. When the gas is lighted, the temperature developed by the Hame immediately affects the check ring 34. The inner strip of this ring will be formed of brass or similar metal,

IIO

having a higher coefficient of expansion than the outer strip 35. From this arrangement, when the temperature rises, the ring will tend to enlarge its diameter and its lower edge will project across the upper extremity of the sleeve as indicated in Fig. 5. In this way the sleeve becomes locked against return and the check device will operate to hold the sleeve in this condition until the temperature becomes substantiallyY normal. After the sleeve has been locked in this manner, the plug 3l may be rotated so as to restrict the VHow ol gas if desired. This movement of the plug will, of course, not affect, the position of theistem 40, as the rack 39 is free to slide thereupon. The movement in depressingthe sleeve 37, of course, operates to compress the spring 42. If the gas flame becomes extinguished, the temperature in the vicinity ot' the tip of the burner will, of course, return to the normal state, and the expansion ring 34 will resume its normal shape and size. Then this occurs, the sleeve will become released and will be returned to its normal elevated position by the spring 42.

In order to enable the burner to be used as a Bunsen burner and to enable it also to be used with a mantle such as is used with a lVelsbach burner, I provide the sleeve 37 and the tube 32 with alining openings 44 as indicated in Fig. 5.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l. In a safety burner, in combination, a member presenting a shoulder, a split ring disposed around the Vflame and adapted to engage said shoulder directly 'when heated, and means for producing a relative sliding movement between said ring and said shoulder to bring the same opposite to each other whereby to engage, said last means being actuated by turning on the gas.

2. In a burner, in combination, a tube through which the gas may flow, a member inovably mounted thereupon, a thermally sensitive member carried between said tube and said movable member, said tube and said member having a shoulder therebetween, said thermally sensitive member affording means for engaging said shoulder when heated, to lock said movable member to said tube, and means for moving said movable member when the gas is turned on.

3. In a gas burner, in combination, a tube adapted to conduct the gas, a sleeve slidably mounted on said tube, one of said members presenting a shoulder, a thermally sensitive member carried by the other member opposite said shoulder and adapted t0 engage said shoulder to lock said sleeve against slicIing on said tube, a plug for turning on the gas, and a connection from said plug to said sleeve for actuating said sleeve.

4. In a burner, in combination, a tube, a thermally sensitive member disposed around said tube near the locality of the Ilame, a plug adapted to turn on the gas, a sleeve slidably mounted in said tube and adapted to be locked by said thermally sensitive member when the gas is turned on, and a connection between said plug and said sleeve affording means for moving said sleeve in one direction only.

5. In a burner, in combination, a tube adapted to conduct the gas, a sleeve slidably mounted on said tube, a thermally sensitive member disposed about said tube near the location of the `flame and a'l'lording means for locking said sleeve to said tube, a plug adapted to turn on the gas, a stem rigid with said sleeve and adapted to slide longitudinally therewith, a member adapted to slide upon said stem, means for limiting the movement of said last member on said stem, and means for advancing said last member when said plug is rotated.

6. In aburner, in combination, abody, a gas tube carried thereby, a plug mounted in said body and adapted to admit gas to said tube, a sleeve slidably mounted on said tube, a thermally sensitive member disposed. near the locality of the flame and adapted to lock said sleeve to said tube, said sleeve having a stein guided in said body, a spring constraining said sleeve toward an extreme position, a rack slidably .mounted on said stem, means whereby said rack may advance said stem in one direction only, and a pinion carried by said plug and meshing with said rack.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NATHAN IISE.

. Vitnesses:

F. D. AMMEN, JNO. M. RITTER. 

